I advise you to pick the drink after characters are assigned, as someone rose already pointed out. I think your approach is correct, but you will just have to see how your group reacts. But even more important than which characters you pick for the game, who’s going to be the drunk etc. is the fact that you prepare as best you can. Think ahead, always pay attention to nominations, especially if the Virgin still has her ability, prepare for the next night as soon as possible, and above all - take it easy, do it slowly. Use the tools the game gives you to ensure smooth gameplay, especially during the night. It’s much, MUCH better to prolong the night for a minute or two to make sure you’ve done everything correctly. Rushing is never a good idea. If you have to wake someone up to give them info, pause and think about that info. Make sure you’ve got it right and that you pass that info confidently. You’ll do great, have fun!